Cyclone Debbie

[kmacdonald]

The platform between the hulls act as a wing. It's like a jet taking off in heavy winds. We have all seen what happens to race cars when they get air under them-------they "take off". Just another disadvantage of the multi hull I suppose.

[svseachange]

The remnants of Debbie going back out to sea around Brisbane and the Gold Coast. Might be a good time to consider preparing for high winds and/or flooding.

According to my gribs it is going to reintensify in the Tasman.

[kmacdonald]

It sure looks that way to me.

[Alan Mighty]

The Bureau of Met model agrees that ex-TC Debbie goes offshore. The BoM model has the central pressure increasing for 30 hours and then slowly rising (i.e. the TC re-strengthens for about 30 hours before weakening).

See: Colour Forecast map for next 4 days

[PaulinOz]

Quote "The platform between the hulls act as a wing. It's like a jet taking off in heavy winds. We have all seen what happens to race cars when they get air under them-------they "take off". Just another disadvantage of the multi hull I suppose."

That's it, I have seen the light, I give up and will sell my 21 ton fully loaded cruising cat as I just can not risk the chance of it getting airborne.

What size dyneema line would I require to tether it down, in the event of an airborne episode?

As my sometimes sparing partner 44'cruisingcat would say "You CANNOT be serious!"

These guys seem to work there arses and wallets off to get them to fly

[44'cruisingcat]

I like the idea of getting airborne. Saves buying a drone.

And flying is the safest way to travel.

[MarkJ]

Originally Posted by 44'cruisingcat

I like the idea of getting airborne. Saves buying a drone.

And flying is the safest way to travel.

[44'cruisingcat]

Photos from Abel point.

You can see entire arms are missing, along with the boats that were on them

[44'cruisingcat]

What's remarkable to me is how few boats had their sails removed. Even the professionally crewed charter yachts.

[daletournier]

How are the rivers such as the Burnett etc going? All the trawlers have come out of tincan bay, I assuming the creek is flooding? The radar is showing massive rain along the coast.

Sent from my vivo Y35 using Cruisers Sailing Forum mobile app

[kmacdonald]

Originally Posted by 44'cruisingcat

What's remarkable to me is how few boats had their sails removed. Even the professionally crewed charter yachts.

I thought the same thing. It's not like it wasn't forecast and they were blindsided by it. May be they knew the futility of the situation. I would have thought that more would have anchored up a river or sheltered area. History has shown marinas are not the place to be in a hurricane.

[Seaslug Caravan]

Originally Posted by 44'cruisingcat

What's remarkable to me is how few boats had their sails removed. Even the professionally crewed charter yachts.

Not remarkable, its all to common these days. The Clowns/ owners haven't got a clue. Sadly the damage that could be prevented by proper/seamanlike preparation ends up being tacked onto future insurance premiums for all of us.

Its time to say enough is enough . Not preparing your boat properly for a named storm voids your policy.

[Factor]

Originally Posted by kmacdonald

The platform between the hulls act as a wing. It's like a jet taking off in heavy winds. We have all seen what happens to race cars when they get air under them-------they "take off". Just another disadvantage of the multi hull I suppose.

Suggest you read the works of Daniel Bernoulli, its been settled science for nearly 300 years. if anything the bridgedeck is like the top of a wing, and thus airflow across it would have an affect of downward pressure not upward.

[PaulinOz]

Originally Posted by 44'cruisingcat

What's remarkable to me is how few boats had their sails removed. Even the professionally crewed charter yachts.

Just talked to the company that manages my charter boat up in The Whitsundays. Their fleet birthed in Abell Point Marina consists of 19 cats, 8 monos and 7 power boats, they all survived, 1 has transom damage above the water line caused by brake up of pontoon walkway.

They spent more time during the storm trying to keep the dock together than trying to keep their boats attached to the dock.

I was also surprised by the number of boats with sails left attached. The Opps manager said they had enough time to strip down all their boats, but was also surprised at the number of flogged out sails hanging around the marina in the aftermath.

In Brisbane currently being hit by the Debbie remnants, gusting 30 knots at present and a large headsail just unfurled it's self in these conditions. So how did they expect them to hold up in a 100+ knots.

[lateral]

Last year we had a 45knot sustained, 65 knt gust, compression zone one night. I spent the night with the rib at the ready, onshore, playing a light over the field. Two boats broke from their mooring.
God knows what would have happened with double that! I just can't imagine that strength wind. At 36° south, these strengths are not common but not unknown.